Trouble excluding some categories from portfolio

I checked that: http://i618.photobucket.com/albums/tt267/shytleh/temp/Screenshot_6_26_13_1_45_PM_zps67d3c206.jpg

For example, ‘Unit 3 – Reserve’ is category 33 only, but still showing up on the portfolio page.

Other thoughts?

I don’t have multiple categories for the posts in question.

As a test, I just created a new category, created a post with that category, and changed the theme settings to exclude that single category. No luck: http://aboutonesouth.com/everything-we-do

Sooooo, I went on a plugin compatibility hunt. Turns out that we had a plugin called ‘ultimate category excluder’. It shouldn’t have created a conflict, but apparently does. Mystery solved!

Thanks for your help!